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本文对２３４５名纺织女工和８１０名女教师不良妊娠进行回顾性调查与分析，在所选的８项观察指标中，自然流产、早产、死产、难产和先天性缺陷５项指标具有显著性差异（Ｐ＜０．０５），８项观察指标的相对危险度（ＲＲ）在１．４１～３．４０之间。自然流产与工龄之间存在直线负相关（ｒ＝－０．９３６０）。
This paper retrospectively surveyed and analyzed adverse pregnancy in 2345 women workers and 810 female teachers. Among the eight indicators selected, there were significant differences in five indicators of spontaneous abortion, premature birth, stillbirth, dystocia and congenital defects (P <0.05). The relative risk (RR) of the eight indicators ranged from 1.41 to 3.40. There is a linear negative correlation between spontaneous abortion and length of service (r = -0.9360).